I'm going to echo most of the other reviews to say these are ONLY good in very soft soil or sand. Actually, they are really good if you are camping on sand! (The metal ones aren't very good in sand)Otherwise, not that great.

These are good to have around in a jam, they are very useful in soft ground like sand or soil have a little more grip. In harder ground they will break, as well in the cold they will have a greater tendency to break. They are also very bulky so not the best suited for back country packing.